-98.33% is the change from 540 to 9
Calculation steps:
[( 9 - 540 ) ÷ 540] x 100 = -98.33%
Formula
Percentage change = [(9 - 540) / 540] x 100
Subtract the new number by the original number
9 - 540 = -531
-531 ÷ 540 = -0.9833333333333333
-0.9833333333333333 x 100 = -98.33%